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Biotite from
Kleggåsen Ruby Quarry, Froland, Agder, Norway


Locality type:Quarry
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Albite5
- var Oligoclase5
Corundum5
- var Ruby3
Rutile3
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Kleggåsen Ruby Quarry, Froland, Agder, Norway
Data Identifiers
Mindat Occurrence Record ID:494000
Long-form Identifier:1:3:494000:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
2.7km (1.7 miles) ⓘSeljeåsen Nickel Prospect, Lyngrott, Froland, Agder, Norway
3.8km (2.4 miles) ⓘBliksåsen, Osedalen, Froland, Agder, Norway
4.2km (2.6 miles) ⓘGloserheia, Froland, Agder, Norway
4.4km (2.7 miles) ⓘÅrgruven Iron Mine, Lyngrott Mining Field, Lyngrott, Froland, Agder, Norway
4.6km (2.8 miles) ⓘSeljeåsen Quartz Prospect, Seljåsen, Lyngrott, Froland, Agder, Norway
9.9km (6.2 miles) ⓘVåland Mine, Holt, Tvedestrand, Agder, Norway
10.0km (6.2 miles) ⓘGrasås Feldspar Quarry, Austre Moland, Arendal, Agder, Norway
10.4km (6.5 miles) ⓘKlodeborg Mines, Øyestad, Arendal, Agder, Norway
10.7km (6.6 miles) ⓘFjeld Quarry (Fjellvand Quarry), Austre Moland, Arendal, Agder, Norway
10.7km (6.7 miles) ⓘLøddesøl, Øyestad, Arendal, Agder, Norway
References
Oftedahl, Christoffer (1963) Contributions to the mineralogy of Norway. No. 19. Red corundum of Froland at Arendal. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 43 (4). 431-440
Larsen. Knut Edvard (2026) Rubinforekomsten på Kleggåsen, Froland [The ruby ​​deposit at Kleggåsen, Froland]. STEIN. Magasin for populærgeologi, 53 (3). p.3-11.
 
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